Combined slide projector case and mounting with forced air cooling device



Jan. 3, 1950 H. 1.. MILLS 2,493,636

COMBINED SLIDE PROJECTOR CASE AND MOUNTING WITH FORCED AIR COOLING DEVICE 2 Sheets-Sheet 1 Filed Feb. 5, 1949 Jan. 3, 1950 H. MILLS 2,493,636 COMBINED SLIDE PROJECTOR CASE AND MOUNTING WITH FORCED AIR COOLING DEVICE Filed Feb. 1949 2 Sheets-Sheet 2 1% J1 Wk Wm;

Patented Jan. 3, 1950 agaasse f QOMBINED sums PROJECTOR oAs AND' OUNTINQ WHWF QFB 21?}: 99 31??? nnvwe s. .Tz' f. eee iee iq Fe sier awe-, 5 82 1 3.1 349; 83.73%). 'ZEh1s invention relates to a combined carryin Another obj f my invention. is. ton ov a case and port for: a. filmprojecton'and. mote. structure which, besidesmakina av a -f: specifically 1s concerned-withJthe pnovisiono'f a, theadvantages?oi:forged,aiificotjlinejo eil; t baseadapted to support a. projector. thereon, and. sou'me, will beiext emelyportable.,and hence eiim cool the heated light sourcetheiteof. by. means, 5 ina'te theidisadvantages Q15. prior. pr eloiffii of a fonced cu rent-Q 'air, projectedbymeans of additidnto. the, above, it ise. pa t ofQ li e i a blower contained withintheoas e. object; to. zpigoxzide stoirage; snacejin the stigutj e The. md .1 projector. e er for still ran roreceessoiiesoiine pmjeem pe P 0? otion piq ures. mus i. "Oneiof the ebiects' o thislinve i on is to r h 1ntens1ty.11ght soumem order, infi l W. m me "e. device. or, the oharasi r e b w requirements of modern. projeqtion will. comprise a.nombi l ibasefof unp tin In, pra t al y ll cases, thel eht some: 99 transparency prpi e eon: t of, a relatively h h watt ee e ri lame 7 providing stor a i c incandescent type, th heat from. whiqt 1 roiecton, and fi eI -e device ay is ip a the lamp is heme. need t: v cooperatin w thtli liais pg ifiet 'fi essential for the pro ec ion Q? the film. em: th timidevice aseem g esi wh n. e

operator. well: as or the p n of lqn am q ie i the eqmnmeni- A ohiegt-ggpn 'i n n isto 'd q the. r is on. o fiitient ,0911% me i e 9 9 with a ,supppr vbas for the 9P0 ct tonewall me o t te car ying case and storage spaqe: 33 t (B -3'1:5

sor1 es thereof. confim tiql iz we; the iqie ei a nov l ba e t RILQJFQPQ sot 11 e .5 1 iie' am. 9 21 9m,

um er o .su h. rqa c rsis ex .1 r h r mm r v com ared hemmlqe f-- fig ig g fig a .1 i r eq 0 'ie edefim den 2'; pend upon com/gem em qosilifii. X flWE 9.1 i

pnonont pn i p. and i d pationof heat. I esp c1 y r r 'to and it is esb'eciallvfof this of got the devioes contemplated'by'my mv been devised. Many persons not 0 chasing additional projecting .equ siring to disoard' satisfaptorily ep '1 mnt will be enabled to ntilizesu comfort and prolong the life thfireof longevity of their transparencies onof invention. 40 It is accordingly the principal object of my in;

vention to provide a device c apaple of, acqoin i i those on hite Pav heme. forth above.

In addition to the disadvantages occasionedby h the great expense heretofore eeenaeemeefime i I saneltspeoti iewoiiabax om ggg gg obtaining of projection equipfiie'ntwim' bun-viii i accordenicewitiimax-inv nt ve i blowers and fans, Such ediii bmrits have always" DI j H LaJL QhQQztQ 21.1.3. ase. been large and bulky and difiidult to carry; .ZisQa sectional viemthrgngh tiglg gp npinege whereby samehav'rarely been truly portable. base and c'ovenan'd. showin the; DIQJ'RGQQiLfi-fig;

having an end wall or a side wall capable of swinging open to admit air into the interior of the structure. The top wall of the structure has an opening therein and a blower is provided in the base arranged to draw air into the base from the open side and force it out through the opening. The opening is adapted to be positioned immediately below the lamp of a projector, the upper wall being provided with means for removably mounting the projector thereon. The upper wall of the base is also provided with means for adjusting the tilt thereof in order to enable tilting of the projector during use. Means are provided for connecting the electric motor of the blower in parallel with the projector, for seating the projector, for covering the projector in order to carry same, and for locking the open side in closed condition while carrying same. The base is also capable of carrying accessories.

Referring'now to the details of the invention, the reference character In designates generally the baseof my invention, I l designates generally the cover therefor, and the reference character I2 designates generally a projector adapted to be Supported upon the base and cooled by the blower.

The base Ill consists of a bottom wall l4 and side walls l5 and [6, having end walls I! and I8. The walls may be formed of any suitable material such as for example wood, which may be treated in any desirable manner to render same durable and attractive. As will be noted, the structure I is oblong in shape and the walls l5, I6, and I! are permanently secured to the bottom wall which is preferably provided with feet I9 of some soft material to prevent the marring of surfaces upon which the device may be placed. The end wall I8 is hinged at the bottom thereof by the hinges 20 and adapted to swing open as shown in Fig. 1 in order to give access to the interior of the base ill. The top edges of all the sides of the base are rabbeted as shown at 2| in order to enable the corresponding edges 22 of the cover member l2 to fit thereon in a manner to be described.

I 'he top wall 25 of the base rests upon bracket members 26 and 21 which are secured Within the base spaced below the upper edges 2| thereof. The bracket member 26 is secured to the inner surface of the left end wall I! while the bracket member 21 is secured at the opposite end of the base In between the ends of the side members l and [6. Obviously the bracket member is free of the end wall l8 which must be able to swing open as explained. The top wall 25 is intended to support the projector I2 thereon, and the weight of the projector will retain the top wall 25 in position whereby same need not be fastened to the base. This may, however, be done in case it is not intended that said wall be tiltable. I prefer however that same merely have a firm fit within the confines of the walls l5. I6, I1, and I8. At one end of the wall 251 provide a thumb screw '30 which is screw-threaded through the wall 25 and has its end bearing against the top of the bracket member 21 so that the turning of the screw will raise or lower the affected end of the wall 25 whereby the same will tilt about the opposite end which is resting upon the bracket mem- 4 ber 26. In Fig. 1 the wall 25 is shown partly tilted up.

The inexpensive type of projector with which my invention is especially concerned (although not being limited thereto) may not have a tilting mechanism as a part thereof, and many such deficient devices are sold in the interests of economy. The tilting arrangement described herein thus provides in addition to the many advantages inherent in my broad structure, a feature which is found for the most part in expensive projection devices.

An electric motor 3! is' mounted within the base 10 upon the spacers 32 which are secured to the bottom wall [4 of the base Ill having a fan or other blowing device 33 secured to the rotating shaft thereof and arranged to project air uption of the blower 33 and the opening 34 are chosen to be directly beneath the light source of the projectors which are intended to be mounted upon the base in order to efficiently cool the same. The projector I2 which is here illustrated has the lamp thereof contained in a housing 36 which, as will be observed in Fig. 2 is immediately above the opening 34 when the projector is attached in place.

'The upper wall 25 is also provided with small cup members 3! positioned to receive the feet 38 of the projector l2. A plurality of these cup members 31 may be provided at, predetermined positions in order to accommodate the differently positioned feet of the typesof projectors with which the apparatus is intended to be associated. The projector I2 is held in position by means of a thumb screw 46 loosely mounted in the center of the wall 25 and of a' type and size to be engaged within'the standard tripod mounting socket 4| with which practically all projectors are provided. The cup members 31 are below the surface of the upper wall 25 so that projectors which have no feet will be secured in position only by means of the thumb screw 40.

In order to provide electric current for the operation of the motor 3!, any suitable connection may be provided. I prefer that the extension' cord supplying the projector and usually having a control switch therein be utilized for both purposes. Thus the switch controls the motor and projector at the same time. The preferred manner of doing this is illustrated. I mount suitable binding posts 45 and 46 upon the upper wall 25insulated therefrom. The leads 4'! and 48 from the motor 3| are electrically engaged with the bottom ends of the respective binding posts 45 and 46. The electric extension cord'49 leading from the projector is bared to expose the component wires 56 and 5! and these are electrically engaged with the upper ends of the respective binding posts 45 and 46 thereby connecting the motor 3| in parallel with the lamp of the projector l2. The extension cord 49 need not be severed. Suitable insulation may be' 5. such as for example providing the upper ends of WiQ Q PWFMQ a d? iths e de e sa and impali'rig the respective wires 50 and Bi thereon so that the prongs extend through the insulation and engage the Wires.

Thecover member l I has a top wall 54 to which issecure'd the carrying handle 55, side walls 55 an 51, and end walls 58 and 59 The bottom edges trthe'wan's 56, 57, 58, sea s are iabb'eted are: r to enable the cover member II to rig and e seated upon the base. End walls 5;} and, 59 are respectively provided with the lialves' fi fl' and Si "of spring clasps, the other halves tllii-l' being secured to end walls II and 18 respectively. Thus the spring clasps serve to hold the cover member I l upon the case l0.

When the base is being utilized, the cover member is removed from the same by releasing the clasps in the well-known manner. Obviously any similar method of securing the cover member to the base may be utilized. In the embodiment illustrated, the half 53 is secured to the end wall 18, which, it will be recalled, is intended to swing open about the hinges 25 when the device is being used. In the arrangement described, therefore, when the case is arranged to be carried with the cover member ll properly in place, the wall [8 is closed and cannot open, whereby it is practically impossible for same to accidentally swing open. The cover member H and its associated clasps therefore serves three purposes, namelythe protection of the projector I! and covering of the base Ill, the provision of means to enable the device to be carried, and the prevention of opening of the wall [8.

When the wall 18 is opened to admit air into the chamber 35, the chamber must be unobstructed to permit a strong draft of cooling air. The space within the chamber 35 is ideally suited for the storing of accessories and apparatus to be used with the projector IZv which can be removed when the projector is to be used. Thus the retaining of the door or wall l8 closed by the cover member ll while the entire assembled device is being carried, also prevents dropping of said accessories or apparatus. In the illustrations I have shown a slide file 54 disposed in the chamber 35 and adapted to be removed when the projector i2 is being used. In order to prevent the slide file 64 from being pushed against the electric motor 3i and blower 33 a stop member 65 is secured to the bottom wall M, as shown in Fig. 2'.

In Fig. 4 there is shown a modified form of my invention with which I have had success. Instead of the end wall opening as does that of the heretofore described embodiment, there is provided a side wall have two parts, one part being fixed and the second part H being hinged to open as shown in the illustration. The end wall 12, corresponding to the wall l8 of Fig. 1 is now permanently affixed to the base 15, although the method of attaching the cover member 59, shown as having identical construction with that utilized in the above described embodiment, is the same as described. The wall 12 and the opposite end wall (not shown) are provided with clasp halves 13 to cooperate with those halves '14 provided on the cover member. The wall ll is here shown having a latch 16 for securing the wall ll closed in cooperation with a pin 11. In accordance with a described feature of my invention, however, the clasp halves 13 and 14 may be provided on the long side of the apparatus between the side wall 18 of the cover membasal-1a the gear 11 st eat seem-mg the cover is ateau-1 lock the door H against opening, oreven ing theslidfe file 8!] from falling out. In all other respects, the base is identical with the ase-w; a

It is 'believed that this; invention, its inode of construction and assembly, and many of its advant 'g'es should be readily understood from the foregoing without furthei description, and it should also be manifest that while a preferred embodiment of the invention has been shown and described 'for' illustrative purposes, the structural details are nevertheless capable of wide variation within the purview of this invention as defined in the appended claims.

What is claimed and desired to be secured by Letters Patent of the United States is:

l. A combination carrying case and support for a slide projector including a base for supporting the projector both while using or carrying the same, said base comprising a cooling chamber and having a blower therein, means leading cooling air from the chamber to the projector, said chamber having a hinged wall at one side thereof adapted to be closed during non-use of the projector and enabling the chamber to be used for storing equipment for the projector, and adapted to be opened when the projector is in use and the equipment removed to serve as air inlet to said chamber, and said case having a cover including a carrying handle and means enabling the cover removably to be attached to the base while covering the projector, comprising clasps, said hinged wall adapted to be secured in closed position by at least one of said clasps only when the cover is so attached to the base.

2. In a combined carrying case and support for a slide projector, a base for supporting the projector both while using or carrying same, said base comprising a cooling chamber and having a blower therein, means leading cooling air from the chamber to the projector, and means for admitting cooling air from the atmosphere to the chamber, said case having a cover including a handle, and means enablin the cover removably to be attached to the base while covering the projector, said chamber having a top wall, means for securing the projector to the said top wall for either carrying or using same, the wall being tiltable to enable vertical changes in the projecting direction of the projector, and said wall having said cooling air leading means provided therein as a part thereof, said tiltable top wall having means for securely holding said projector against jarring motion while carryin said case, means for causing said top wall to assume any desired angle of tilt without disengaging said projector, said means comprising a thumb screw threaded through one end of the top wall and engaging against a portion of the chamber.

3. In a combined carrying case and support for a slide projector, a base for supporting the projector both while using or carrying same, said base comprising a cooling chamber and having a blower therein, means leading cooling air from the chamber to the projector, and means for admitting cooling air :from the atmosphere to the chamber, said case having a cover including a handle, and means enabling the cover removably to be attached to the base while covering the projector, said chamber having a top wall, means for securing the projector to said top wall for either carrying 01 using same, said means including recesses in said top wall coinciding with legs on the projector for positioning said legs therein, said top wall having a central recess adapted to engage a threaded member whereby the projector is rigidly secured to the top wall by means of said threaded member, the wall being tiltable to enable vertical changes in the projection direction of the projector, means for tilting said top wall attached to said wall, said means comprising a thumb screw threaded through one end of the top wall and engaging against a portion of the chamber, and said wall having said cooling air leading means provided therein as a part thereof. I

HIRAM LAWRENCE NIILIS.

REFERENCES CITED 'The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,351,765 Koch Sept. 7, 1920 1,716,322 Proctor June 4, 1929 1,873,016 Oplinger et a1. Aug. 23, 1932 1,966,351 Tint July 17, 1934 2,139,152 Freimann Dec. 6, 1938 2,160,890 Mu1ch June 6, 1939 2,268,450 Haggett Dec. 30, 1941 Osterberg et a1 May 5, 1942 

